diff --git a/hocon/Cargo.toml b/hocon/Cargo.toml
index d426225f..9991f998 100644
--- a/hocon/Cargo.toml
+++ b/hocon/Cargo.toml
@@ -15,7 +15,7 @@ repository = "https://github.com/j5ik2o/oni-comb-rs"
 oni-comb-parser-rs = { version = "0.0.*", path = "../parser" }
 log = "0.4.20"
 envy = "0.4"
-rust_decimal = "1.33"
+rust_decimal = "1.34"
 rust_decimal_macros = "1.34"
 chrono = "0.4.33"
 anyhow = "1.0.79"
diff --git a/parser/Cargo.toml b/parser/Cargo.toml
index 524bafd4..55b5a8cc 100644
--- a/parser/Cargo.toml
+++ b/parser/Cargo.toml
@@ -21,7 +21,7 @@ regex = "1.10"
 anyhow = "1.0.79"
 env_logger = "0.11.1"
 prop-check-rs = "0.0.471"
-rust_decimal = "1.33.1"
+rust_decimal = "1.34.0"
 chrono = "0.4.33"
 pom = "3.3.0"
 nom = "7.1.3"